Tool crinding machine



Feb. 14, 1933. l., KELLENBERGER 1,897,055

TOOL .GRNDNG MACHINE Filed ocr. 27, 195o 2 sheets-sheet 1 Feb- 14, 1933. L. KELLENBERGER v 1,897,055

TOOL GRINDING MACHINE Filed Oct. 27, 1930 2 Sheets-Shea?l 2 Patented Feb. 14, 1933 UNITED kSTA'IES f--P'ATfEN'r ,rien

'JIOOLl GRINDING- MACHINE `App1caton led October 27, 1930, Serial No. 491,611, and in Germany November 5, 1929.

`The object of this invention is to simplify the Vattendance of tool grinding machines in order to increase the performance thereof. Vith this improved machine it is possible to leffect the three feeding movements requisite *with tool grinding machines, viz. the longitudinal movement of the work table, the transverse movement of the grinding rest and `the'verticalmovement of the same, including the lgrinding' disk, wherever the workman may have his place in front, or at the back, of'the machine, and he may change over from any one of said movements to any other thereof without leaving his place, aswell as without interrupting the grinding work.

The tools, the shape, size and material of which is extraordinarily different, lconditions a very great many-sid-edness of the rclamping possibilities, also different shapes and sizes of the grinding disks, which latter mustbe able to operate in vertical and in horizontal position, as well as Iin inclined ones. In view of the great accuracy required r for the grinding of tools, it is necessary, that the operator can continually watch the grinding operation from a suitable place that must be chosen with respect to the particular tool to Abe ground. The places are, thus, very different, also with respect to the clamping device employed in the one or the other case,

and also the height in which the grinding operation is effected can considerably vary so that in one case vthe operator must sit while that operation proceeds and in another case he must stand. It will be obvious that the performance of a grinding machine will be the greater, the less the operator need change that place from which he can best watch the grinding, as every change necessitates an interruption of the work.

Now, in contradistinction to the known tool grinding machines, the present improved machine enables the man at the machine to operate it in sitting, as well as in standing position from any place at the front and at the rear of the machine, that is to say, he can effect the three feed movements mentioned in the preceding paragraph without any necessity to change or leave his place and to interrupt the grinding work; there are, for

this purpose, `provided so many actuation `members for the machine parts concerned,

chines, the operator cannot help to changehis place now and then in order to actuate another of the feeding members which not only means an interruption of the work, but also compels the man to look thereafter at the respective work piece under another angle of view, which always causes also a certain loss of time, this angle is now, with the present improved machine, always the same which is very useful for the accuracy of the work and means an increase of the same.

Another feature of the invention is this that, in order to reduce the manufacturing cost-s of the machine, the members for effecting the longitudinal movements of the table are assembled in a casing which is common to them and can be detached very easily as a whole or unit from the place where it just had been, and can be attached to another place at he front or at the rear of the machine. Therefore, insteadof providing, for instance, four sets of actuating members only one set thereof is necessary, whereby a considerable saving in the manufacturing costs of the machine is attained.

The thus improved machineis illustrated diagralnmatically and by way of example on the accompanying drawings on which Figure l is a front-view of a tool grinding machine designed according to this invention; Figure 2 is a plan of the same, Figure 3 is a frontview of the attachable and detachable feeding mechanism for the longitudinal movement of the table, and Figure l is a vertical section through this mechanism.

The stationary standard a (Fig. l) sup' ports in known manner the table Z) which is longitudinally movable. The clamping table c proper which can be adjusted horizontally in known manner under various angles is so attached to the table b as t-o take part in' themovements otthesame. VOn the table c is usual mannerwby means of a handiwheel f,

mounted theheads'tock @Zand the tailstock e.

Thetable c -is moved lengthwise in the f" 4a'pinion gv (Figs. 3-and14) and a rack h.

There are provided, according to this invention, three more feedimq; "mechanisms also intended for the longitudinail movement of said table andbein'g provided inturn with hand-wheels f1, f2 and f3, as indicated in dotted lines inA Fi'ggQLj. Thekgrinding 'resta' can be adjusted vertically i'n known manner f by means of the hand-wheel VVo, andcan also Vat the rear fof* the machine.

l beturned by 180. The handwheel ois,

feasibly practically-arranged inthe middleV Vof the machine in suchlas position-thatl it isv within the rangeof the workman from everyy place he may have assumed atjthe"frontor` j f In the grindingrestisfsupported inlinown manner the grinding spindle which is driven an electroniotorf Y, dislsfc and Z.- l ,l p Y 'A The saidrestfis supported infturnupon a slidei'nfand caribel adjust-ed transversely in and carries two grinding known manner lat the front,,aswellfaszatthe rear of the machine by means 'of hand-wheels a and al.' These two wheelsare so arranged that they are withiiithe'rea'chof .the fworkwhere n Y I thereof are atthe frontfofth'e machine,two at the rear, and one ofFeachlof thesepairs 'is located lefthandk 4and the other; righthand` .i

V[man wherever he may have his-place at'the v r front or at the rear of the machine.

in; rig-'.2 A, B, o and Diseases-remplace@ kworkman may stand or v`sit; two;

from the middle ltransverseaXi's `ofthe ima- Y chine. The-workman can gniov'e the working tabled longitudinally from any1 of ,the four places A, B, C and D,by actuating the nearest of the handwlieels f2 andff3 (.of'

which f1, fgjand f3 are indicatedmerelyby dotted lines in Fig. 2), or hegma'y make use of one or the otherjof thefhand4 levers 70,101, p2 and p? (of which 01,712 and p3 are indicated [merely in'dottedlinesnin-Fig-l2) which are vprovided `by 'way of supplement to simplify,V

moving said tablev lengthwise, the arrange-V ment i of ,these members beingilsuch i that g the workman can use vthem selectively instand- -ing or in sitting position. ,Alsothe 'trans- Y v verse movement foft'he `slide fm` can be effected from anyof the four places A,`B,-C and D by means of'-the`handwheelswtandm21, and the i255 sameistruefofthevertical movements of the 1 head-'stock which can be operated fromy any i 'of said places by mean'sof the' ,handwheelffm y Y c l i .the workmanjremaining thus, `standing oi' 7 [154.60 .1. VNew, inorder toenableattending tothe sitting, at his vplace. and the grinding :workv proceeding .withoutzthe least interruption.

machine. from any ofthe said places .without necessitatingthe employment 4of vfour driving members uref,- f1,f2 and f3 and of the fourdrivlzlg membersxlilre :371, 'p2' kand .Y .Y

j VV133222055 the entire driving mechanism for the longitudinal movement of the table is assembled in a casing sV so as to constitute a kindof unit which canbe easily attached to, and detached fromany'of the places concernedFigs. 3 and. 4-show that unit. g denotes a horizontal shaft provided at its outer end with fthe hand-. wheel fand at vvits inner end withufavbevelf wheel 7, as Ywell aswith ak pinion g whichmeshes` with a rack h that is irmly connected with 'the Vtable. Zi; thus, by Yturning the hand-A ythe'hub of the wheelsffl yThe bevel-wheel'7I nieshesvfith a similar -wheelin1 aixed'to a shortvertical shaft uV forming atits lower end Vva sort of hub o into whichtheleverp caribe inserted and securedin this position byl means of a screw to. p Thislpositionoffthe lever p is that shown in full lines in Figa; In this-position the leverrcan-.beturned ink a horizontal plaiie,jwhile when being coupled withhthehubv the hand-wheel it can be turned in a verticalplane, lnFig. 3 in which the lever is attached to the liebe-it .has been turned horizont-ally by y909relatively to Fig.v4. f

' All these members .are assembled in,vv heldjby,theicasing siwhich is piovidedrwith a dove-tail'guide t Figl 3), and can be easily shifted with this guide into thejcounter-guide ofthe ystandard without any .preliminarylaborv that may benecessaryj forthat change. .lclaim'z I 'A tool-grindingA machine, comprising, in

.combination with the ftool-grinding. means proper, a pluralityof meansffor yeilf'ectii'ig the longitudinal movements of the' woiktable,

these means beingsprovided in such a number and in such, positions that the operative canI actua-te them.from any place 'he `may have y'assur'ned at thefrontorqatgth'e rear of the machine-without' interruptingthe grinding operation, and beinga'ssembled in ax cas-- ing` whichj is commonv ,theretoandf attachable to, and detachable from themachine at respective places, substantiallyjas set forth, i

ln'testimonywhereof I aix my signature. 

